รบกวนอธิบาย code programe ได้หรือไม่ครับ มันเป็นรูปแบบที่ผมไม่เคยเห็น

private string insertedValue;

protected void SqlDataSource1_Inserted(object sender, SqlDataSourceStatusEventArgs e)
{
     //use e.AffectedRows for ensure success action. The store read this value and set predefined Confirm depend on e.AffectedRows
     //The Confirm can be granted or denied in OnRecord....ed event

     insertedValue = e.Command.Parameters["@newId"].Value != null
                            ? e.Command.Parameters["@newId"].Value.ToString()
                            : "";  
}

      
        <asp:SqlDataSource 
            ID="SqlDataSource1" 
            runat="server" 
            ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
            DeleteCommand="DELETE FROM Suppliers WHERE (SupplierID = @SupplierID)"
            InsertCommand="INSERT INTO Suppliers 
                               (CompanyName,
                                ContactName,
                                ContactTitle, 
                                Address, 
                                City, 
                                Region, 
                                PostalCode, 
                                Country, 
                                Phone, 
                                Fax) 
                            VALUES 
                                (@CompanyName,
                                 @ContactName,
                                 @ContactTitle,
                                 @Address,
                                 @City,
                                 @Region,
                                 @PostalCode,
                                 @Country,
                                 @Phone,
                                 @Fax);                         
                            SELECT @newId = @@Identity;"
                            
            SelectCommand="SELECT 
                                SupplierID, 
                                CompanyName, 
                                ContactName, 
                                ContactTitle, 
                                Address, 
                                City, 
                                Region, 
                                PostalCode, 
                                Country, 
                                Phone, 
                                Fax                            
                           FROM Suppliers"
                           
            UpdateCommand="UPDATE Suppliers SET 
                                CompanyName = @CompanyName, 
                                ContactName = @ContactName, 
                                ContactTitle = @ContactTitle, 
                                Address = @Address, 
                                City = @City, 
                                Region = @Region, 
                                PostalCode = @PostalCode, 
                                Country = @Country, 
                                Phone = @Phone, 
                                Fax = @Fax
                           WHERE (SupplierID = @SupplierID)"
                           
            OnInserted="SqlDataSource1_Inserted">
            
            <DeleteParameters>
                <asp:Parameter Name="SupplierID" Type="Int32" />
            </DeleteParameters>
            
            <UpdateParameters>
                <asp:Parameter Name="CompanyName" Type="String" />
                <asp:Parameter Name="ContactName" Type="String" />
                <asp:Parameter Name="ContactTitle" Type="String" />
                <asp:Parameter Name="Address" Type="String" />
                <asp:Parameter Name="City" Type="String" />
                <asp:Parameter Name="Region" Type="String" />
                <asp:Parameter Name="PostalCode" Type="String" />
                <asp:Parameter Name="Country" Type="String" />
                <asp:Parameter Name="Phone" Type="String" />
                <asp:Parameter Name="Fax" Type="String" />
                <asp:Parameter Name="SupplierID" Type="Int32" />
            </UpdateParameters>
            
            <InsertParameters>
                <asp:Parameter Name="CompanyName" Type="String" />
                <asp:Parameter Name="ContactName" Type="String" />
                <asp:Parameter Name="ContactTitle" Type="String" />
                <asp:Parameter Name="Address" Type="String" />
                <asp:Parameter Name="City" Type="String" />
                <asp:Parameter Name="Region" Type="String" />
                <asp:Parameter Name="PostalCode" Type="String" />
                <asp:Parameter Name="Country" Type="String" />
                <asp:Parameter Name="Phone" Type="String" />
                <asp:Parameter Name="Fax" Type="String" />
                <asp:Parameter Direction="Output" Name="newId" Type="Int32" />
            </InsertParameters>
        </asp:SqlDataSource>